Spiral propeller



June 12, 1923. I 1,458,600

' J. TABER SPIRAL PROPELLER Filed June 1'7, 1920 avwewtoz Jase ah Taber Patented June 12, 1923.

rice- JOSEII-I TABER, OF MILLIBROOK, NEW YORK.

SPIRAL PROPELLER.

Application filed June 17, 1920. Serial No. 389,681.

To all whom it may concern Be it known that I, Josnrrr TABER, a citizen of the United States, residing at Millbrook, in the county of Dutchess and State of New York, have invented certain new and useful Improvements in a Spiral "Propeller, of which the following is a specifcation.

The present invention relates to improvements in spiral propellers and more particularly to a spiral propeller which is affixed to the bow of a vessel for the more speedy propulsion thereof.

The further object is to provide a propeller of the above type which is simple in construction, compact and durable, and one which may be manufactured at a reasonably low cost;

In the drawings t- I Fig. 1 is a view in side elevation of my invention showing clearly the exterior construction of the propeller and a carrying means therefor.

Fig. 2 is a View in longitudinal cross section showing the interior construction and the means for driving the propeller.

Fig. 3 is a view in cross section taken on line 33 of Fig. 2.

In the drawings 10 designates a portion of the bow of a Vessel in which one end 11 of the propeller is j ournaled. This end is preferably in the form of a sleeve and its projecting portion is within the inner end of the propeller cone 12. The propeller, as thus constituted, is in the nature of a long hollow shell made in two interfitting parts or section for convenience in assembling; the parts being welded or otherwise secured at the joint to provide an integral whole. A carrying member or keel 13 has one end fixed to the bow of the vessel and its other end provided with a bearing 1-1 in which the outer end of the propeller cone 12 operates.

The propeller cone is freely rotatable, a unit, on its bearings and may be driven from the main or engine shaft in manner such as hereinafter described.

As will be observed upon reference to the drawings, the propeller cone 12 is provided with external spiral fins or flanges and that these fins orfianges extend the entire length of the cone. It is to be understood that any number of these fins or flanges may be employed and that I am not limitedto any particular width or dimensions.

The main drive shaft 15 extends through the sleeve 11 and has its outer end loosely mounted in a bearing lfi near the outer end of the propeller cone 12. A suitable bearing bracket, such as shown at 17, may beuset to support this shaft inwardly of its outer end.

A countershaft 18also extends into the propeller cone 12 in slightly spaced relation to the inner wall of the cone and carries a pinion 19 which meshes with a pinion 20 on the main drive shaft 15. The counter-shaft 18 also carries'spaced drive pinions 21 which mesh with the teeth of circular racks 22 on peller will n'iaterially aid in the steering of the boat and at the same time insure a speedy propulsion thereof.

Water may be excluded at the point where the propeller shell is journaled in. the hull by packing or other means in a manner well known in the art.

What is claimed is:

The combination with a boat hull of a propeller shell formed of integral sections, spiral fins provided externally of one section, circular racks provided internally of the other section, a drive shaft extending from the hull into the shell, a gear onsaid shaft, and gears connecting the drive shaft gear with the circular rack of the propeller shell.

In testimony whereof I allix my signature.

JOSEPH TABER. 

